Elastomers containing polyamide groups and polyurea groups in bonded form, as well as a process for the preparation of elastic, non-cellullar molded articles from these elastomers

US4789691A · kind A · utility

Assignee

• BASF SE

Inventors

• Guenter Matzke · Heidelberg, DE
• Peter Horn · Heidelberg, DE
• Hans U. Schmidt · Griesheim, DE

Key dates

• Filing date: Mar 15, 1988
• Grant date: Dec 6, 1988
• Expiry date: Mar 15, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2120/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The subject of this invention is elastomers containing polyamide groups and polyurea groups in bonded form, which are prepared by the reaction of PA0 (a) at least one organic polyisocyanate and/or a modified polyisocyanate mixture having an NCO content of from 8 to 33.6 weight percent, PA0 (b) at least one polyazomethine and PA0 (c) at least one alkyl-substituted aromatic polyamine having a molecular weight up to 500, in the presence of or in the absence of PA0 (d) catalysts, whereby reaction products of polyoxyalkylenepolyamines, having a functionality of from 2 to 4 and an average molecular weight of from 180 to 10,000 and at least one organic aldehyde and/or preferably ketone, are used as the polyazomethines.